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package neembuu.uploader.httpclient;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.http.Header;
import org.apache.http.HttpEntityEnclosingRequest;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.ProtocolException;
import org.apache.http.client.CircularRedirectException;
import org.apache.http.client.RedirectStrategy;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.client.methods.HttpOptions;
import org.apache.http.client.methods.HttpPatch;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpTrace;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.params.ClientPNames;
import org.apache.http.client.utils.URIUtils;
import org.apache.http.impl.client.RedirectLocations;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpContext;
/**
* Custom redirect handler. It is like <a href="https://svn.apache.org/repos/asf/httpcomponents/httpclient/tags/4.2.5/httpclient/src/main/java/org/apache/http/impl/client/DefaultRedirectStrategy.java">this</a>.
* The edited methods are: createLocationURI(final String location)
* @author davidepastore
*/
public class CustomRedirectStrategy implements RedirectStrategy{
public static final String REDIRECT_LOCATIONS = "http.protocol.redirect-locations";
/**
* Redirectable methods.
*/
private static final String[] REDIRECT_METHODS = new String[] {
HttpGet.METHOD_NAME,
HttpHead.METHOD_NAME
};
public CustomRedirectStrategy() {
super();
}
@Override
public boolean isRedirected(
final HttpRequest request,
final HttpResponse response,
final HttpContext context) throws ProtocolException {
if (request == null) {
throw new IllegalArgumentException("HTTP request may not be null");
}
if (response == null) {
throw new IllegalArgumentException("HTTP response may not be null");
}
int statusCode = response.getStatusLine().getStatusCode();
String method = request.getRequestLine().getMethod();
Header locationHeader = response.getFirstHeader("location");
switch (statusCode) {
case HttpStatus.SC_MOVED_TEMPORARILY:
return isRedirectable(method) && locationHeader != null;
case HttpStatus.SC_MOVED_PERMANENTLY:
case HttpStatus.SC_TEMPORARY_REDIRECT:
return isRedirectable(method);
case HttpStatus.SC_SEE_OTHER:
return true;
default:
return false;
} //end of switch
}
public URI getLocationURI(
final HttpRequest request,
final HttpResponse response,
final HttpContext context) throws ProtocolException, URISyntaxException {
if (request == null) {
throw new IllegalArgumentException("HTTP request may not be null");
}
if (response == null) {
throw new IllegalArgumentException("HTTP response may not be null");
}
if (context == null) {
throw new IllegalArgumentException("HTTP context may not be null");
}
//get the location header to find out where to redirect to
Header locationHeader = response.getFirstHeader("location");
if (locationHeader == null) {
// got a redirect response, but no location header
throw new ProtocolException(
"Received redirect response " + response.getStatusLine()
+ " but no location header");
}
String location = locationHeader.getValue();
URI uri = createLocationURI(location);
HttpParams params = request.getParams();
// rfc2616 demands the location value be a complete URI
// Location = "Location" ":" absoluteURI
try {
// Drop fragment
uri = URIUtils.rewriteURI(uri);
if (!uri.isAbsolute()) {
if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
throw new ProtocolException("Relative redirect location '"
+ uri + "' not allowed");
}
// Adjust location URI
HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
if (target == null) {
throw new IllegalStateException("Target host not available " +
"in the HTTP context");
}
URI requestURI = new URI(request.getRequestLine().getUri());
URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
uri = URIUtils.resolve(absoluteRequestURI, uri);
}
} catch (URISyntaxException ex) {
throw new ProtocolException(ex.getMessage(), ex);
}
RedirectLocations redirectLocations = (RedirectLocations) context.getAttribute(
REDIRECT_LOCATIONS);
if (redirectLocations == null) {
redirectLocations = new RedirectLocations();
context.setAttribute(REDIRECT_LOCATIONS, redirectLocations);
}
if (params.isParameterFalse(ClientPNames.ALLOW_CIRCULAR_REDIRECTS)) {
if (redirectLocations.contains(uri)) {
throw new CircularRedirectException("Circular redirect to '" + uri + "'");
}
}
redirectLocations.add(uri);
return uri;
}
/**
* @since 4.1
*/
protected URI createLocationURI(final String location) throws ProtocolException {
try {
URI uri;
//NULogger.getLogger().log(Level.INFO, "location: {0}", location);
//If it contains a special char we create our custom uri (it fails otherwise)
if(location.contains("|")){
uri = neembuu.uploader.utils.URIUtils.createURI(location);
}
else{
uri = new URI(location);
}
return uri.normalize();
} catch (URISyntaxException ex) {
throw new ProtocolException("Invalid redirect URI: " + location, ex);
}
}
/**
* @since 4.2
*/
protected boolean isRedirectable(final String method) {
for (String m: REDIRECT_METHODS) {
if (m.equalsIgnoreCase(method)) {
return true;
}
}
return false;
}
@Override
public HttpUriRequest getRedirect(
final HttpRequest request,
final HttpResponse response,
final HttpContext context) throws ProtocolException {
URI uri = null;
try {
uri = getLocationURI(request, response, context);
} catch (URISyntaxException ex) {
Logger.getLogger(CustomRedirectStrategy.class.getName()).log(Level.SEVERE, null, ex);
}
String method = request.getRequestLine().getMethod();
if (method.equalsIgnoreCase(HttpHead.METHOD_NAME)) {
return new HttpHead(uri);
} else if (method.equalsIgnoreCase(HttpGet.METHOD_NAME)) {
return new HttpGet(uri);
} else {
int status = response.getStatusLine().getStatusCode();
if (status == HttpStatus.SC_TEMPORARY_REDIRECT) {
if (method.equalsIgnoreCase(HttpPost.METHOD_NAME)) {
return copyEntity(new HttpPost(uri), request);
} else if (method.equalsIgnoreCase(HttpPut.METHOD_NAME)) {
return copyEntity(new HttpPut(uri), request);
} else if (method.equalsIgnoreCase(HttpDelete.METHOD_NAME)) {
return new HttpDelete(uri);
} else if (method.equalsIgnoreCase(HttpTrace.METHOD_NAME)) {
return new HttpTrace(uri);
} else if (method.equalsIgnoreCase(HttpOptions.METHOD_NAME)) {
return new HttpOptions(uri);
} else if (method.equalsIgnoreCase(HttpPatch.METHOD_NAME)) {
return copyEntity(new HttpPatch(uri), request);
}
}
return new HttpGet(uri);
}
}
private HttpUriRequest copyEntity(
final HttpEntityEnclosingRequestBase redirect, final HttpRequest original) {
if (original instanceof HttpEntityEnclosingRequest) {
redirect.setEntity(((HttpEntityEnclosingRequest) original).getEntity());
}
return redirect;
}
}